Hi Margaret,
Welcome! You are not alone. Stay strong and ask if you have questions. Someone here always has answers, advice or similar stories.
Mine is similar, young and married to a heroin addict. I hope you have family or friends to support you, it is very important. Also, none of this is your fault! You didn't cause it, you can't stop stop it. You can choose to be there for him on his road through addiction or to recovery.
Stay strong for yourself and your baby!